A.) Disarm Weapons or Shield- You press a button multiple times like mad, then when pressed enough, your opponent's weapon flings away. Number of times the button is pressed depends on the weight of the shield or weapon.
B.) Levitate and Fling- You could make NPCs/creatures levitate like Wingardium Leviosa, then like an item fling them away. How you can make them levitate depends on the target's willpower. When the target is down, he will have to get up, much like the aftermath of paralysis in OB.
C.) Deflect Projectiles- When things like arrows go your way, if you could time it right, you could stop the arrow in its tracks and at a higher perk, throw them back. Depends on your timing.
The main drawback is that you stand still since you are focusing your mind.
In battle, if you are have all perks regarding Telekinesis, it will look like this:
PC is wandering around the frozen wilderness, hunting Dragons, then sees a Bandit Bowman (which will now be known as BB), yelling "Jump on my sword while you can!", while CLEARLY he has bow equipped. He then takes the bow, and fires an elven arrow at PC. PC, a master in telekinesis, stands there deflecting the arrows back at BB. BB says "WTH?", then grabs a dagger a charges to PC. The PC, still standing still, yells 'EXPELLIARMUS!", and the BBs dagger is thrown away. BB, now frustrated, pulls out his fists and continues to charge to PC. The PC, realizing he can't disarm someone's fists, while STILL standing still, levitates the opponent with ease, flings him upward, casts a fireball, then puts a flaming gylph on the ground. When the BB lands, trying to get up, the gylph explodes in his face. Then PC continues on, still searching for dragons.
Sorry about the story, got carried away.
Anyways what do you think?